This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A253055 #9 May 09 2021 02:28:27 %S A253055 15,35,27,39,45,51,55,65,91,49,63,57,69,75,81,87,99,77,119,133,161, %T A253055 175,105,117,123,135,125,145,155,165,203,147,141,153,171,185,195,143, %U A253055 121,187,159,183,189,201,205,215,235,225,207,219,231,209,243,249,217,245 %N A253055 Odd composite terms in A098550 that are neither primes nor terms of A251544, in order of appearance. %C A253055 A098550 is the union of A000040, A251237, A251544, and this sequence. %Y A253055 Cf. A098550, A000040, A251237, A251544, A253056. %K A253055 nonn %O A253055 1,1 %A A253055 _N. J. A. Sloane_, Jan 01 2015